21053488

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:553

約数の個数: 40

約数和(自身を含む): 42425856

約数和(自身を除く): 21372368

約数列:

[1, 2, 4, 8, 16, 43, 71, 86, 142, 172, 284, 344, 431, 568, 688, 862, 1136, 1724, 3053, 3448, 6106, 6896, 12212, 18533, 24424, 30601, 37066, 48848, 61202, 74132, 122404, 148264, 244808, 296528, 489616, 1315843, 2631686, 5263372, 10526744, 21053488]

約数ペア:

[(1, 21053488), (2, 10526744), (4, 5263372), (8, 2631686), (16, 1315843), (43, 489616), (71, 296528), (86, 244808), (142, 148264), (172, 122404), (284, 74132), (344, 61202), (431, 48848), (568, 37066), (688, 30601), (862, 24424), (1136, 18533), (1724, 12212), (3053, 6896), (3448, 6106)]